./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:39,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:39,942 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:39,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:39,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:39,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:39,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:39,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:39,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:39,977 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:39,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:39,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:39,979 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:39,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:39,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:39,981 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:39,981 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:39,982 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:39,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:39,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:39,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:39,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:39,985 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:39,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:39,986 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:39,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:39,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:39,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:39,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:39,988 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:39,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:39,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:39,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:39,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:39,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:39,991 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:39,991 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:39,992 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:39,992 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:39,993 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 [2023-11-06 21:53:40,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:40,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:40,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:40,325 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:40,326 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:40,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2023-11-06 21:53:43,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:43,681 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:43,681 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2023-11-06 21:53:43,689 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/data/29040d7b2/55af2f7bc91e4ed6a6e45450e8eeb5e1/FLAG6881fa117 [2023-11-06 21:53:43,707 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/data/29040d7b2/55af2f7bc91e4ed6a6e45450e8eeb5e1 [2023-11-06 21:53:43,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:43,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:43,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:43,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:43,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:43,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:43,731 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518d9cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43, skipping insertion in model container [2023-11-06 21:53:43,731 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:43,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:43,945 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c[946,959] [2023-11-06 21:53:43,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:43,962 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:43,982 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c[946,959] [2023-11-06 21:53:43,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:43,999 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:44,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43 WrapperNode [2023-11-06 21:53:44,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:44,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:44,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:44,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:44,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,047 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-11-06 21:53:44,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:44,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:44,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:44,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:44,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:44,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:44,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:44,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:44,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (1/1) ... [2023-11-06 21:53:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:44,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:44,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-06 21:53:44,177 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-06 21:53:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-06 21:53:44,177 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-06 21:53:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:44,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:44,256 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:44,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:44,475 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:44,484 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:44,484 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 21:53:44,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:44 BoogieIcfgContainer [2023-11-06 21:53:44,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:44,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:44,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:44,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:44,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:43" (1/3) ... [2023-11-06 21:53:44,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157962d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:44, skipping insertion in model container [2023-11-06 21:53:44,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:43" (2/3) ... [2023-11-06 21:53:44,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157962d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:44, skipping insertion in model container [2023-11-06 21:53:44,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:44" (3/3) ... [2023-11-06 21:53:44,500 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2023-11-06 21:53:44,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:44,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:44,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:44,591 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@552a8a1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:44,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:53:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 21:53:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:53:44,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:44,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:44,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:44,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2023-11-06 21:53:44,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632935498] [2023-11-06 21:53:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:45,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632935498] [2023-11-06 21:53:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632935498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:45,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:45,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:53:45,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340238253] [2023-11-06 21:53:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:45,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:45,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:45,116 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:53:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:45,221 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-11-06 21:53:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-06 21:53:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:45,234 INFO L225 Difference]: With dead ends: 39 [2023-11-06 21:53:45,235 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 21:53:45,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:53:45,243 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:45,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 21:53:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-06 21:53:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-06 21:53:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-06 21:53:45,295 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2023-11-06 21:53:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:45,296 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-06 21:53:45,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:53:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-06 21:53:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:53:45,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:45,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:45,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:45,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:45,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2023-11-06 21:53:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:45,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830454329] [2023-11-06 21:53:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:45,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830454329] [2023-11-06 21:53:45,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830454329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:45,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:45,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:53:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862867512] [2023-11-06 21:53:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:45,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:53:45,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:53:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:45,414 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:53:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:45,476 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-11-06 21:53:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:45,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-06 21:53:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:45,478 INFO L225 Difference]: With dead ends: 33 [2023-11-06 21:53:45,479 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 21:53:45,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:53:45,481 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:45,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 21:53:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-06 21:53:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-06 21:53:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-06 21:53:45,493 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2023-11-06 21:53:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:45,493 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-06 21:53:45,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:53:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-06 21:53:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 21:53:45,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:45,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:53:45,497 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:45,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2023-11-06 21:53:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:45,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77282307] [2023-11-06 21:53:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:45,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:53:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:45,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77282307] [2023-11-06 21:53:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77282307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503860655] [2023-11-06 21:53:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:45,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:45,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:45,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:45,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:46,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:46,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503860655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:46,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:46,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-11-06 21:53:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277372316] [2023-11-06 21:53:46,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:46,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:53:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:46,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:53:46,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:53:46,321 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 21:53:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:46,605 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2023-11-06 21:53:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:53:46,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2023-11-06 21:53:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:46,613 INFO L225 Difference]: With dead ends: 55 [2023-11-06 21:53:46,613 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 21:53:46,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:53:46,622 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:46,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 136 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 21:53:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-06 21:53:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-06 21:53:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-06 21:53:46,649 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2023-11-06 21:53:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:46,650 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-06 21:53:46,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 21:53:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-06 21:53:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 21:53:46,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:46,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:46,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 21:53:46,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:46,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2023-11-06 21:53:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:46,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106211603] [2023-11-06 21:53:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:46,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106211603] [2023-11-06 21:53:47,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106211603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:47,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045847255] [2023-11-06 21:53:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:47,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:47,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:47,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:47,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:47,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:47,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:47,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045847255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:47,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:47,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-11-06 21:53:47,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054513344] [2023-11-06 21:53:47,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:53:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:53:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:53:47,503 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 21:53:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:47,670 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-11-06 21:53:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:53:47,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2023-11-06 21:53:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:47,679 INFO L225 Difference]: With dead ends: 51 [2023-11-06 21:53:47,679 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 21:53:47,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:53:47,682 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:47,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 110 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 21:53:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-06 21:53:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-06 21:53:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2023-11-06 21:53:47,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2023-11-06 21:53:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:47,713 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2023-11-06 21:53:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 21:53:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2023-11-06 21:53:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 21:53:47,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:47,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:47,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:47,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:47,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:47,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2023-11-06 21:53:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346649094] [2023-11-06 21:53:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:53:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 21:53:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:53:48,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346649094] [2023-11-06 21:53:48,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346649094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634929898] [2023-11-06 21:53:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:48,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:48,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:48,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:48,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:53:48,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:53:48,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:53:48,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634929898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:48,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:48,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2023-11-06 21:53:48,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39603006] [2023-11-06 21:53:48,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:53:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:53:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:53:48,712 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-06 21:53:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:49,040 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2023-11-06 21:53:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:53:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2023-11-06 21:53:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:49,043 INFO L225 Difference]: With dead ends: 105 [2023-11-06 21:53:49,043 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 21:53:49,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:53:49,046 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:49,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 159 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 21:53:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-06 21:53:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-11-06 21:53:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2023-11-06 21:53:49,061 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2023-11-06 21:53:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:49,061 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2023-11-06 21:53:49,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-06 21:53:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2023-11-06 21:53:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:53:49,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:49,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:49,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:49,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:49,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2023-11-06 21:53:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:49,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5505908] [2023-11-06 21:53:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:49,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 21:53:49,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:49,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5505908] [2023-11-06 21:53:49,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5505908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:49,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848725866] [2023-11-06 21:53:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:49,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:49,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:49,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:53:49,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:53:49,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:53:50,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848725866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:50,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:50,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2023-11-06 21:53:50,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334670499] [2023-11-06 21:53:50,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:50,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:53:50,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:53:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:53:50,096 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-06 21:53:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:50,513 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2023-11-06 21:53:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:53:50,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 37 [2023-11-06 21:53:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:50,517 INFO L225 Difference]: With dead ends: 177 [2023-11-06 21:53:50,518 INFO L226 Difference]: Without dead ends: 117 [2023-11-06 21:53:50,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:53:50,520 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:50,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 258 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:53:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-06 21:53:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2023-11-06 21:53:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2023-11-06 21:53:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2023-11-06 21:53:50,544 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2023-11-06 21:53:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:50,544 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2023-11-06 21:53:50,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2023-11-06 21:53:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2023-11-06 21:53:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 21:53:50,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:50,548 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:50,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:50,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:50,754 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:50,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2023-11-06 21:53:50,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:50,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027432851] [2023-11-06 21:53:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:50,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:51,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 21:53:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:53:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027432851] [2023-11-06 21:53:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027432851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147850205] [2023-11-06 21:53:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:51,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:51,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:53:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:51,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:53:51,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 21:53:51,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 21:53:51,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147850205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:51,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:51,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2023-11-06 21:53:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890821213] [2023-11-06 21:53:51,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:51,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:53:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:53:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:53:51,613 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-06 21:53:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:51,925 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2023-11-06 21:53:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:53:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 51 [2023-11-06 21:53:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:51,929 INFO L225 Difference]: With dead ends: 262 [2023-11-06 21:53:51,930 INFO L226 Difference]: Without dead ends: 162 [2023-11-06 21:53:51,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:53:51,932 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:51,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 218 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-06 21:53:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2023-11-06 21:53:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 31 states have call successors, (31), 10 states have call predecessors, (31), 18 states have return successors, (103), 37 states have call predecessors, (103), 31 states have call successors, (103) [2023-11-06 21:53:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2023-11-06 21:53:51,961 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2023-11-06 21:53:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:51,962 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2023-11-06 21:53:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2023-11-06 21:53:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2023-11-06 21:53:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:53:51,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:51,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:51,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:52,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:52,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1130362923, now seen corresponding path program 1 times [2023-11-06 21:53:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118755479] [2023-11-06 21:53:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 21:53:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:53:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118755479] [2023-11-06 21:53:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118755479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771079616] [2023-11-06 21:53:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:52,469 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:52,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:53:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:52,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 21:53:52,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 21:53:52,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771079616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:52,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:52,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2023-11-06 21:53:52,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896542725] [2023-11-06 21:53:52,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:52,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:53:52,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:53:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:53:52,865 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-06 21:53:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:53,224 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2023-11-06 21:53:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:53:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2023-11-06 21:53:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:53,228 INFO L225 Difference]: With dead ends: 301 [2023-11-06 21:53:53,228 INFO L226 Difference]: Without dead ends: 98 [2023-11-06 21:53:53,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:53:53,232 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:53,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 200 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-06 21:53:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2023-11-06 21:53:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 16 states have call successors, (16), 6 states have call predecessors, (16), 11 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2023-11-06 21:53:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2023-11-06 21:53:53,270 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2023-11-06 21:53:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:53,271 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2023-11-06 21:53:53,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-06 21:53:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2023-11-06 21:53:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 21:53:53,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:53,279 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:53,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:53,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:53,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1087717907, now seen corresponding path program 2 times [2023-11-06 21:53:53,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:53,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765618910] [2023-11-06 21:53:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:53,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 21:53:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 21:53:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:53,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765618910] [2023-11-06 21:53:53,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765618910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:53,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827822403] [2023-11-06 21:53:53,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:53,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:54,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:53:54,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:54,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:54,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:53:54,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-06 21:53:54,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 21:53:54,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827822403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:54,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:54,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 11] total 24 [2023-11-06 21:53:54,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865965445] [2023-11-06 21:53:54,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:53:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:53:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:53:54,903 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2023-11-06 21:53:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:55,425 INFO L93 Difference]: Finished difference Result 179 states and 304 transitions. [2023-11-06 21:53:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:53:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) Word has length 79 [2023-11-06 21:53:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:55,434 INFO L225 Difference]: With dead ends: 179 [2023-11-06 21:53:55,434 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 21:53:55,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 21:53:55,439 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:55,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 240 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:53:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 21:53:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2023-11-06 21:53:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (29), 17 states have call predecessors, (29), 14 states have call successors, (29) [2023-11-06 21:53:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2023-11-06 21:53:55,459 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 79 [2023-11-06 21:53:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:55,461 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2023-11-06 21:53:55,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 14 states have call predecessors, (26), 16 states have call successors, (26) [2023-11-06 21:53:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2023-11-06 21:53:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 21:53:55,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:55,464 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:55,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:55,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:55,675 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:55,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:55,675 INFO L85 PathProgramCache]: Analyzing trace with hash 780870354, now seen corresponding path program 1 times [2023-11-06 21:53:55,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:55,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444060851] [2023-11-06 21:53:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 21:53:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 21:53:56,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:56,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444060851] [2023-11-06 21:53:56,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444060851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:56,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763211035] [2023-11-06 21:53:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:56,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:56,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:56,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:56,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:53:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:56,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:53:56,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 21:53:56,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 21:53:56,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763211035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:56,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:56,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2023-11-06 21:53:56,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121431010] [2023-11-06 21:53:56,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:56,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:56,773 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-06 21:53:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:56,917 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2023-11-06 21:53:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:53:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 65 [2023-11-06 21:53:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:56,919 INFO L225 Difference]: With dead ends: 91 [2023-11-06 21:53:56,919 INFO L226 Difference]: Without dead ends: 87 [2023-11-06 21:53:56,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:56,921 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:56,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 616 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-06 21:53:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2023-11-06 21:53:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (26), 15 states have call predecessors, (26), 13 states have call successors, (26) [2023-11-06 21:53:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2023-11-06 21:53:56,930 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 65 [2023-11-06 21:53:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:56,930 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2023-11-06 21:53:56,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-06 21:53:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2023-11-06 21:53:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 21:53:56,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:56,932 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:56,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 21:53:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:53:57,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:57,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2023-11-06 21:53:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:57,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915578812] [2023-11-06 21:53:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 21:53:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:53:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 21:53:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-06 21:53:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-06 21:53:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-06 21:53:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-06 21:53:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915578812] [2023-11-06 21:53:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915578812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189744130] [2023-11-06 21:53:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:57,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:57,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:53:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:57,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-06 21:53:57,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 21:53:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189744130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:58,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:58,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 22 [2023-11-06 21:53:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080392321] [2023-11-06 21:53:58,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:53:58,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:53:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:53:58,729 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) [2023-11-06 21:53:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:59,026 INFO L93 Difference]: Finished difference Result 146 states and 204 transitions. [2023-11-06 21:53:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:53:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) Word has length 79 [2023-11-06 21:53:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:59,028 INFO L225 Difference]: With dead ends: 146 [2023-11-06 21:53:59,028 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 21:53:59,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 166 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:53:59,032 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:59,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 218 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 21:53:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 21:53:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 21:53:59,036 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2023-11-06 21:53:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:59,036 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 21:53:59,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 9 states have call predecessors, (24), 17 states have call successors, (24) [2023-11-06 21:53:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 21:53:59,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 21:53:59,040 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 21:53:59,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:59,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:59,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-06 21:53:59,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-06 21:53:59,645 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-06 21:53:59,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-06 21:53:59,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-11-06 21:53:59,646 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-06 21:53:59,646 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-11-06 21:53:59,646 INFO L895 garLoopResultBuilder]: At program point main_returnLabel#1(lines 37 44) the Hoare annotation is: (<= 4 |ULTIMATE.start_main_~x~0#1|) [2023-11-06 21:53:59,646 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-11-06 21:53:59,646 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= |ULTIMATE.start_main_~x~0#1| 4) [2023-11-06 21:53:59,646 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-11-06 21:53:59,646 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-11-06 21:53:59,647 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 2 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2023-11-06 21:53:59,647 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-11-06 21:53:59,647 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse2 (= |fibo2_#t~ret6| 1)) (.cse1 (= fibo2_~n |fibo2_#in~n|))) (let ((.cse0 (and (<= |fibo2_#in~n| 2) .cse2 (<= 2 fibo2_~n) .cse1))) (and (or .cse0 (and (<= 4 |fibo2_#in~n|) .cse1) (and .cse2 (= 3 |fibo2_#in~n|))) (or (= fibo2_~n 3) .cse0 (< 3 |fibo2_#in~n|))))) [2023-11-06 21:53:59,647 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-11-06 21:53:59,647 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-11-06 21:53:59,647 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-11-06 21:53:59,647 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-11-06 21:53:59,648 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-11-06 21:53:59,648 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-11-06 21:53:59,648 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 2 |fibo1_#in~n|)) [2023-11-06 21:53:59,648 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-11-06 21:53:59,648 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (= |fibo1_#t~ret4| 1) (<= |fibo1_#in~n| 3) .cse0) (and (= 2 |fibo1_#t~ret4|) .cse0 (= fibo1_~n 4)) (and (<= 5 |fibo1_#in~n|) .cse0))) (< 2 |fibo1_#in~n|)) [2023-11-06 21:53:59,648 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-11-06 21:53:59,648 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-11-06 21:53:59,648 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-11-06 21:53:59,649 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-11-06 21:53:59,649 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-11-06 21:53:59,649 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-11-06 21:53:59,652 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:59,655 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:53:59,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:53:59 BoogieIcfgContainer [2023-11-06 21:53:59,668 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:53:59,669 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:53:59,669 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:53:59,669 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:53:59,670 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:44" (3/4) ... [2023-11-06 21:53:59,672 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 21:53:59,677 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2023-11-06 21:53:59,677 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2023-11-06 21:53:59,682 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-06 21:53:59,682 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 21:53:59,682 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 21:53:59,683 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 21:53:59,747 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 21:53:59,747 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 21:53:59,747 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:53:59,748 INFO L158 Benchmark]: Toolchain (without parser) took 16029.88ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 108.2MB in the beginning and 81.6MB in the end (delta: 26.6MB). Peak memory consumption was 91.9MB. Max. memory is 16.1GB. [2023-11-06 21:53:59,748 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 111.1MB. Free memory is still 83.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:53:59,749 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.29ms. Allocated memory is still 146.8MB. Free memory was 108.2MB in the beginning and 97.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:53:59,749 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.27ms. Allocated memory is still 146.8MB. Free memory was 97.6MB in the beginning and 96.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:53:59,749 INFO L158 Benchmark]: Boogie Preprocessor took 30.91ms. Allocated memory is still 146.8MB. Free memory was 96.2MB in the beginning and 95.5MB in the end (delta: 723.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:53:59,750 INFO L158 Benchmark]: RCFGBuilder took 402.74ms. Allocated memory is still 146.8MB. Free memory was 95.5MB in the beginning and 112.9MB in the end (delta: -17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 21:53:59,751 INFO L158 Benchmark]: TraceAbstraction took 15177.18ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 112.2MB in the beginning and 84.7MB in the end (delta: 27.5MB). Peak memory consumption was 94.5MB. Max. memory is 16.1GB. [2023-11-06 21:53:59,751 INFO L158 Benchmark]: Witness Printer took 78.71ms. Allocated memory is still 211.8MB. Free memory was 84.7MB in the beginning and 81.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 21:53:59,753 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 111.1MB. Free memory is still 83.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.29ms. Allocated memory is still 146.8MB. Free memory was 108.2MB in the beginning and 97.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.27ms. Allocated memory is still 146.8MB. Free memory was 97.6MB in the beginning and 96.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.91ms. Allocated memory is still 146.8MB. Free memory was 96.2MB in the beginning and 95.5MB in the end (delta: 723.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 402.74ms. Allocated memory is still 146.8MB. Free memory was 95.5MB in the beginning and 112.9MB in the end (delta: -17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 15177.18ms. Allocated memory was 146.8MB in the beginning and 211.8MB in the end (delta: 65.0MB). Free memory was 112.2MB in the beginning and 84.7MB in the end (delta: 27.5MB). Peak memory consumption was 94.5MB. Max. memory is 16.1GB. * Witness Printer took 78.71ms. Allocated memory is still 211.8MB. Free memory was 84.7MB in the beginning and 81.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.1s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 434 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 375 mSDsluCounter, 2322 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2021 mSDsCounter, 238 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2315 IncrementalHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 238 mSolverCounterUnsat, 301 mSDtfsCounter, 2315 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1175 GetRequests, 951 SyntacticMatches, 29 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 82 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 401 PreInvPairs, 484 NumberOfFragments, 103 HoareAnnotationTreeSize, 401 FomulaSimplifications, 1797 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 767 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 913 NumberOfCodeBlocks, 913 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1330 ConstructedInterpolants, 0 QuantifiedInterpolants, 2890 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1159 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 1005/1452 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (4 <= x) RESULT: Ultimate proved your program to be correct! [2023-11-06 21:53:59,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f87b98f-2a2d-4fad-bf40-9e07af31328f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE